Bradford White EFR160T120 Series Installation & Operating Manual page 69

Error
Definition of Code
Code
Pressure Switch
29
Failed to Close
Lower Sensor
32
Readings Faulty
Flame Rod Shorted
57
to Ground
AC Line Frequency
Error – Signal Too
58
Noisy or Frequency
Incorrect
Line Voltage Too
59
Low or High
DC Output Voltage
61
Unstable
Maximum Number of
62
Retries Detected
Maximum Number of
63 Ignition Recycles
Detected
64 Electronics Failure
High Water
65 Temperature (Over
200°F (93°C))
Cause of Problem and Actions Taken to Correct
The blocked vent pressure switch contacts have opened. Check to make sure
the venting system is not blocked. Check to make sure the condensate drain is
not clogged and is sloping toward the drain. Make sure the vent length does
not exceed the specified limits. Make sure the vent terminal is not blocked.
Check to make sure the pressure switch tubing is clear. Replace the pressure
switch if the venting system has checked out O.K. Control will reset once
problem is corrected.
Resistance of lower sensor out of operating range. Check continuity of wire
harness to lower sensor, and if O.K., replace lower sensor.
Pilot flame sensor rod is shorted to ground. Check to see if flame sensor wire
has bare spots touching metal parts of if flame sensor rod is touching the burner
or other metal parts. Replace if flame sense wire is damaged or flame rod is
bent.
Check line voltage frequency to the water heater. Determine if there are wide
fluctuations. Call an electrician if the problem persists. The water heater
should be on a separate line.
Check line voltage to the water heater. Determine cause of low or high voltage.
Call an electrician or your utility. The water heater should be on a separate line.
Check line voltage to the water heater for erratic readings. Also check wiring to
make sure there are no shorts. If power supply and wiring are O.K., replace
control board.
Burner is either not lighting or not staying lit during ignition cycle. Check inlet
gas pressure for minimum pressure on rating label. Can you hear sparking to
the burner? Check high voltage cable connections. Check inlet gas pressure
to the gas valve making sure the pressure is within the limits specified on the
rating label. Check gas valve wire harness for broken wires or shorts. Check
outlet gas pressure. If 24 volts is present to the terminals at the gas valve,
replace gas valve. Check for voltage output to the blue gas valve wires on the
control board pins. If during the ignition trial period, there is no voltage present
at the control board pin terminals for the blue wires leading to the gas valve,
then replace the control board. Replace spark rod if insulator is damaged or
rod is loose. Check to make sure combustion blower is operating when
thermostat calls for heat. If blower is not running check for 120 volts to blower
harness and then at blower pin connections. Replace control, wire harness, or
blower if defective. Check to make sure vent terminals are clear of debris or
snow and ice. Make sure the condensate drain flows freely.
Burner flame is lost during run cycle, then re-established on ignition cycle.
Check inlet gas pressure. Is gas pressure dropping below the minimum
operating pressure on the rating label after the gas valve opens? Is the gas
pipe size to the water heater adequate? Check the condition of the burner.
Clean or replace as needed. Check the burner flame and observe the
microamp output on the run cycle. Replace burner if clogged with dirt and
debris. Replace spark rod or flame sensor if damaged. Check to make sure
vent terminals are clear of debris or snow and ice. Make sure the condensate
drain flows freely.
Replace control board.
Water temperature in tank has exceeded 200°F (93°C). Check tank sensor.
Make sure sensor is fully inserted into the well (clip on sensor wire secures
sensor in place). Check sensor reading. If not within specifications, replace
sensor. If sensor and wire harnesses check O.K., replace control board.
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